In Situ Transmission Electron Microscopy Investigation on Oriented Attachment of Nanodiamonds

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2023-10-09 DOI:10.1021/acs.nanolett.3c03300

Yuting Shen, Shi Su, Tao Xu, Kuibo Yin, Kaishuai Yang* and Litao Sun*,

引用次数: 0

Abstract

Oriented attachment (OA) plays an important role in the assembly of nanoparticles and the regulation of their size and morphology, which is expected to be an effective means to modulate the properties of nanodiamonds (NDs). However, there remains a dearth of comprehensive investigation into the OA mechanism of NDs. Using in situ transmission electron microscopy, we conducted atomic-resolution investigation on the OA events of ND pairs under electron beam irradiation. The occurrence of an OA event is contingent upon the alignment between two ND surfaces, and the coalesced particles undergo recrystallization to form spherical shapes. Both experimental observations and molecular dynamics (MD) simulations reveal that ND pairs exhibit a preference for coalescing along the {111} surfaces. Additionally, MD simulations indicate that kinetic factors, such as contact surface area and contact angle, also influence the coalescence process.

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纳米金刚石定向附着的原位透射电子显微镜研究。

定向附着（OA）在纳米颗粒的组装及其尺寸和形态的调节中发挥着重要作用，有望成为调节纳米金刚石（ND）性能的有效手段。然而，对NDs的OA机制仍然缺乏全面的调查。利用原位透射电子显微镜，我们对电子束辐照下ND对的OA事件进行了原子分辨率研究。OA事件的发生取决于两个ND表面之间的排列，并且聚结的颗粒经历再结晶以形成球形。实验观察和分子动力学（MD）模拟都表明，ND对表现出沿着{111}表面聚结的偏好。此外，MD模拟表明，接触表面积和接触角等动力学因素也会影响聚结过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.